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Armor Piercing Rounds: 308 Winchester?

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Ammo/Self Defense

Gun owners often wonder about the penetration capabilities of the .308 Winchester (AKA the 7.62×51 NATO) round. Is .308 armor-piercing? The answer to this question requires a journey of discovery. First, we’ll discuss which .308 armor-piercing rounds are available. Second, we’ll discuss if armor-piercing .308 rounds (AP) are legal for civilians. Finally, we’ll do some real-world testing with NIJ-certified body armor. 

Are regular full-metal-jacket .308 rounds armor-piercing? No, not exactly. With a long enough barrel, they might penetrate low-level body armor, but they aren’t going to penetrate hardened steel or stop armored vehicles. However, armor-piercing .308 rounds do exist – designated “AP” (armor-piercing); these are also often known as 308 ‘black tip.’ Generally, these rounds are restricted for everyday civilians. 

However, there are always some nuances. 

Armor Piercing Rounds: 308 Ammo

On its own, .308 Winchester is a powerful centerfire cartridge. It delivers about twice the muzzle energy of .223 Rem, and ballistically holds its own against the mighty .30-06. It’s no wonder it caught the U.S. military’s attention and its 7.62×51 counterpart became a staple caliber in a variety of battle rifles. Many of these rifles were special-purpose weapons, which required specific loads. Here’s a look at a few designations: 

Can .308 Winchester Penetrate Body Armor? 

In the traditional sense, standard .308 ammunition is not intended to be armor-piercing. Armor-piercing rounds contain a hardened steel core or tungsten carbide. Both these cores are extremely hard, allowing them to punch through armor plates. However, .308 Winchester is able to penetrate some low-level body armor. Of course, barrel length, range, and ballistics all play a factor. 

Imagine a rubber ball hitting your vehicle’s windshield at a high rate of speed. The ball deforms on impact, spreading the force over a larger area and reducing the pressure on the glass. Now imagine a rock of the same size and speed hitting the windshield. Because the rock is much harder and deforms less, the force is concentrated into a smaller area, producing much higher pressure and causing the windshield to fracture.

In a similar way, armor-piercing ammunition uses a very hard core that resists deformation on impact, allowing it to concentrate its momentum and energy into a small area of the armor and generate pressures high enough to defeat materials that would stop a conventional soft lead bullet.

Full Metal Analysis

When a projectile strikes body armor, the outcome depends on how the armor can absorb, spread, or stop that energy. Conventional bullets are often made of softer materials, such as lead or copper, that deform significantly on impact, increasing their contact area and dissipating energy. Modern body armor often defeats projectiles by shattering them, absorbing energy, and distributing forces through multiple stacked layers.

To achieve penetration, projectiles must contain a hardened core made from materials that resist deformation, allowing them to maintain a small impact area and generate very high localized pressures. If those pressures exceed the strength of the armor material, the armor can crack, fracture, erode, or be pushed aside, allowing the projectile to penetrate. That’s why a copper bullet from a centerfire cartridge is unlikely to achieve penetration.

Modern hardened armor counters this by using strong ceramics, metals, and composite fibers that either shatter the projectile, distribute the force over a larger area, or absorb the energy through controlled deformation. Ultimately, penetration is governed by the interplay between the projectile’s momentum, kinetic energy, material hardness, shape, and the mechanical properties of the armor.

Armor Piercing Black Tip .308/7.62×51

Both M933 and M61 7.62×51 NATO rounds have armor-piercing capabilities. These rounds are commonly known as ‘black tip’ as the round has, you guessed it, a black tip. M933 was introduced in 2015 by the NAMMO ballistic group, while M61 has been a standard military designation AP round since 1954. 

In place of lead, these rounds contain a hardened steel or tungsten core (or, sometimes both, stacked). This increased hardness is what allows these rounds to penetrate armor. What can 308/7.62×51 NATO AP ammunition penetrate? Let’s talk about it. 

Depending on ballistics, here’s a general idea of what .308/7.62×51 NATO AP ammunition can penetrate: 

These are just a few reference points. How the .308/7.62×51 NATO AP ammunition will act in any given situation will hinge on the environment, the distance, the weapon, the load strength, and more. 

Incendiary .308 Armor Piercing Ammunition (AP) 

The .308 AP rounds were also manufactured with an incendiary silver tip. A variety of companies make these incendiary rounds, with different name designations, including variations that function as tracers. If you do get your hands on any old incendiary rounds, take caution as they can produce higher pressures and may not be suitable for all firearms. 

Is .308 AP Ammunition Illegal? 

Most .308 AP ammunition is legal if you’re authorized to have it. You can’t walk into any gun shop and buy the stuff. In addition, the only people who regularly own and use modern, factory-made AP ammunition are military and law enforcement.

However, some people possess .308 AP ammunition by buying .308 AP made before the 1986 ATF ban. As you might imagine, it’s neither cheap nor easy to find specialty ammunition made almost forty years ago. However, to the persistent ammo shopper, it can be done.

Can You Buy .308 AP Ammo? 

As we said in the last section, there is one way for average shooters to get their hands on some .308 AP ammunition. Basically, you need to buy AP ammunition that was manufactured before it was banned, pre-1986. Believe it or not, you can still find this stuff on some auction sites, and in many cases, it’s legal for you to own. 

With all that said, we should include a disclaimer: check your local laws. The United States has no shortage of laws and no shortage of areas that have specific ordinances. Let’s talk about another option to attain .308 AP ammunition. 

Building .308 AP Ammunition 

In some cases, you can build .308 AP ammunition for yourself. You buy the AP bullets and use them to build your own rounds. 

You may make your own .308 AP ammunition if you have the appropriate license. Again, this is a potential route. You’ll need to be careful to follow regulations because if you start giving or selling this homemade .308 AP to your friends, you might run into issues. 

Real World Testing: .308 VS Body Armor

To find out more about the capabilities of .308 Winchester ammo vs body armor, we decided to head to the gun range. We packed a Wilson Combat AR-10 Recon rifle, with an 18″ barrel and XXX optic. For body armor, we brought an assortment: III-A Soft armor,  Level III+ plate (AR600 steel), Level IV ceramic plate, and an RF1-rated carbon-fiber panel, made from material provided by the Carbon Rivers group.

To get things rolling, we invited a buddy with us to the range who knows a thing or two about speed. NASCAR Xfinity Series driver Chad Finchum, joined us to do some shooting and take a look at the results. For ammo, we grabbed mostly what we had on hand. Resulting in a good mix of modern cartridges, military surplus, and legendary classics. You can see the full ammo list below:

Check out the full video below to see how each .308 Win round performed vs body armor:

History of .308 Winchester (7.62 NATO) 

The .308 Winchester didn’t start out as an armor-piercing round. It became a popular option in the 1950s. The US military wanted a round that was a little more practical than the .30-06 for automatic weapons; however, they didn’t want to lose a ton of power. 

And the .308 Winchester was born. The .308 is the civilian counterpart to 7.62 NATO, and the two rounds are nearly identical. In general, these two rounds are interchangeable, though you should verify that your 7.62 NATO rifle is safe to take .308 ammunition, as .308 rounds tend to generate a little more pressure. 

Armor Piercing Rounds: .308 Win Ammunition

Most .308 Winchester ammunition available to civilian shooters is not armor-piercing. Standard .308 loads typically use lead-core bullets designed for hunting, target shooting, or general-purpose use. Armor-piercing .308 ammunition, by contrast, uses a hardened penetrator core—often made from steel or another hard material—that is designed to resist deformation and concentrate force on a small area of impact.

The enhanced penetration capability of these projectiles comes from their construction rather than simply their caliber. When striking a hard target, the hardened core is able to maintain its shape more effectively than a conventional lead-core bullet, allowing it to generate extremely high localized pressures. This helps the projectile penetrate barriers and armor materials that might stop or significantly deform standard ammunition.

Because armor-piercing ammunition is subject to federal, state, and local regulations, availability and ownership requirements can vary. Anyone interested in purchasing, possessing, or manufacturing armor-piercing ammunition should carefully review the laws that apply in their jurisdiction. This article is intended solely as an overview of the characteristics and physics of armor-piercing .308 ammunition and should not be considered legal advice.

Hopefully, this cleared some things up for you. In addition, be sure to check out our article answering questions about the history of body armor.

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